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Method for producing methyl alcohol and derivatives of methyl alcohol by coal underground gasification product gases

A technology for underground gasification and product gas, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of hydroxyl compounds, etc., can solve the problem of not considering optimal utilization in detail, and achieve the effect of increasing production and sales revenue and reducing costs.

Inactive Publication Date: 2017-08-11
ZHONGWEI SHANGHAI ENERGY TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0019] e) The downstream synthesis gas utilization process does not consider and optimize the utilization of beneficial by-product coalbed methane in coal seams

Method used

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  • Method for producing methyl alcohol and derivatives of methyl alcohol by coal underground gasification product gases
  • Method for producing methyl alcohol and derivatives of methyl alcohol by coal underground gasification product gases
  • Method for producing methyl alcohol and derivatives of methyl alcohol by coal underground gasification product gases

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Embodiment Construction

[0048] The technical solutions of the present invention will be further specifically described below through specific embodiments and in conjunction with the accompanying drawings.

[0049] In one embodiment, methanol is produced from underground coal gasification product gas ( figure 1 ), the air separation unit (ASU) 1 is used to produce liquid oxygen (LOX) with a concentration higher than 90mole%, and 2 is used for the pure oxygen gasification of underground coal gasification. At the same time, the air separation unit (ASU) 1 also produces nitrogen 3, which can be used as utilities for the entire process, such as ISC underground gasifier 4 purge, pipeline and equipment purge, project start-up and shutdown purge, etc. When higher pressure nitrogen is required, a booster compressor is used to provide the required supply pressure. High-concentration liquid oxygen (LOX)2 also passes through the booster pump, increasing the oxygen supply pressure. Gaseous oxygen (GOX) 2 is the...

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Abstract

The invention relates to a method for producing methyl alcohol and derivatives of the methyl alcohol by coal underground gasification product gases. The method includes the steps: (1) producing coarse synthesis gases of proper economic scales by the aid of coal underground gasification; (2) acquiring dry synthesis gases; (3) conveying the dry synthesis gases to an acidic water gas conversion and cooling unit, and adjusting carbon hydrogen ratio expected by downstream methyl alcohol synthesis reaction; (4) conveying the cooled synthesis gases to an acidic gas removing unit for desulfurization; (5) performing decarburization on the synthesis gases; (6) performing synthesis reaction on the synthesis gases by a methyl alcohol synthesis unit to obtain the methyl alcohol. According to the method for producing the methyl alcohol and the derivatives of the methyl alcohol by the coal underground gasification product gases, downstream finished product ranges are widened by the aid of main by-products in a coal underground gasification process, and later processing and discharging cost is reduced.

Description

technical field [0001] The invention relates to a method for producing methanol and its derivatives by utilizing underground coal gasification product gas, and belongs to the technical field of comprehensive utilization of coal underground gasification product gas. Background technique [0002] Underground Coal Gasification (ISC) is a process of directly converting coal into product gas through the combustion and gasification reaction of underground coal seams with the help of oxidants. The product gas, often called syngas, can be used as a feedstock for downstream processes such as fuel production, chemical production, power generation, and more. This process integrates well construction and completion, underground coal mining and coal gasification technology, and has the advantages of good safety, small investment, high benefit and less pollution. [0003] Coal gasification process is the process of converting coal into syngas through a series of chemical reactions. Majo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/151C07C31/04C07C41/09C07C43/04
CPCC07C29/1518C07C41/09C07C31/04C07C43/043
Inventor 卡斯珀·扬·亨德利克·伯格闵振华汪原理
Owner ZHONGWEI SHANGHAI ENERGY TECH CO LTD
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